Heat sink for a light fixture



FIG. 1 is a perspective view of a heat sink for a light fixture showing our new design;

FIG. 2 is a front view thereof, the back view being a mirror image thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof; and

FIG. 5 is a bottom view thereof. 

The ornamental design for a heat sink for a light fixture, as shown and described. 